Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine represents high precision and tuning stability, featuring a refined 1:18 gear ratio for smooth, sensitive adjustments. Originally setting the benchmark for closed tuners in 1966, this upgraded design delivers modern improvements while maintaining flawless functionality.
Crafted with high-precision CNC machining and surface finishing, every unit features solid brass string posts engineered into the housing to ensure wear-free longevity. An innovative stepped M6 flanged washer reliably centers the string post via the banjo bolt, eliminating tilting friction and protecting both the post and mounting screw without requiring stepped peghead drilling.
Permanently lubricated with Schaller special grease for completely maintenance-free operation, the M6 90 matches the exact installation dimensions of its predecessor for direct replacement. Its self-locking drive mechanism provides consistent tension and rock-solid performance across varied playing styles.
| Gear Ratio | 1:18 |
| Weight per Single Tuner with Button (Small/Large) | Metal: 1.27 oz / 1.34 oz (36 g / 38 g), Perloid: 1.06 oz / 1.09 oz (30 g / 31 g), Ebony: 1.06 oz / 1.09 oz (30 g / 31 g) including hollow bolt |
| Button Bore Hole | 0.17 in (4.2 mm) diameter with 0.14 in (3.6 mm) drive flat |
| Brand | Schaller |
| Model | M6 90 |
| Product Type | Guitar Tuning Machine |
| Weight | 0.13 lb |
| SKU | 10050170.03.35 |
